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/*
* Copyright (c) 2013 Stefano Pigozzi <stefano.pigozzi@gmail.com>
*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <IOSurface/IOSurface.h>
#include <CoreVideo/CoreVideo.h>
#include <OpenGL/OpenGL.h>
#include <OpenGL/CGLIOSurface.h>
#include "video/mp_image_pool.h"
#include "gl_hwdec.h"
struct priv {
CVPixelBufferRef pbuf;
GLuint gl_texture;
struct mp_hwdec_ctx hwctx;
};
static struct mp_image *download_image(struct mp_hwdec_ctx *ctx,
struct mp_image *hw_image,
struct mp_image_pool *swpool)
{
if (hw_image->imgfmt != IMGFMT_VDA)
return NULL;
CVPixelBufferRef pbuf = (CVPixelBufferRef)hw_image->planes[3];
CVPixelBufferLockBaseAddress(pbuf, 0);
void *base = CVPixelBufferGetBaseAddress(pbuf);
size_t width = CVPixelBufferGetWidth(pbuf);
size_t height = CVPixelBufferGetHeight(pbuf);
size_t stride = CVPixelBufferGetBytesPerRow(pbuf);
struct mp_image img = {0};
mp_image_setfmt(&img, IMGFMT_UYVY);
mp_image_set_size(&img, width, height);
img.planes[0] = base;
img.stride[0] = stride;
mp_image_copy_attributes(&img, hw_image);
struct mp_image *image = mp_image_pool_new_copy(swpool, &img);
CVPixelBufferUnlockBaseAddress(pbuf, 0);
return image;
}
static bool check_hwdec(struct gl_hwdec *hw)
{
if (hw->gl_texture_target != GL_TEXTURE_RECTANGLE) {
MP_ERR(hw, "must use rectangle video textures with VDA\n");
return false;
}
if (hw->gl->version < 300) {
MP_ERR(hw, "need >= OpenGL 3.0 for core rectangle texture support\n");
return false;
}
if (!CGLGetCurrentContext()) {
MP_ERR(hw, "need cocoa opengl backend to be active");
return false;
}
return true;
}
static int create(struct gl_hwdec *hw)
{
struct priv *p = talloc_zero(hw, struct priv);
hw->priv = p;
hw->converted_imgfmt = IMGFMT_UYVY;
hw->gl_texture_target = GL_TEXTURE_RECTANGLE;
if (!check_hwdec(hw))
return -1;
hw->hwctx = &p->hwctx;
hw->hwctx->type = HWDEC_VDA;
hw->hwctx->download_image = download_image;
GL *gl = hw->gl;
gl->GenTextures(1, &p->gl_texture);
return 0;
}
static int reinit(struct gl_hwdec *hw, struct mp_image_params *params)
{
params->imgfmt = hw->driver->imgfmt;
return 0;
}
static int map_image(struct gl_hwdec *hw, struct mp_image *hw_image,
GLuint *out_textures)
{
if (!check_hwdec(hw))
return -1;
struct priv *p = hw->priv;
GL *gl = hw->gl;
CVPixelBufferRelease(p->pbuf);
p->pbuf = (CVPixelBufferRef)hw_image->planes[3];
CVPixelBufferRetain(p->pbuf);
IOSurfaceRef surface = CVPixelBufferGetIOSurface(p->pbuf);
gl->BindTexture(hw->gl_texture_target, p->gl_texture);
CGLError err = CGLTexImageIOSurface2D(
CGLGetCurrentContext(), hw->gl_texture_target, GL_RGB,
CVPixelBufferGetWidth(p->pbuf), CVPixelBufferGetHeight(p->pbuf),
GL_RGB_422_APPLE, GL_UNSIGNED_SHORT_8_8_APPLE, surface, 0);
if (err != kCGLNoError)
MP_ERR(hw, "error creating IOSurface texture: %s (%x)\n",
CGLErrorString(err), gl->GetError());
gl->BindTexture(hw->gl_texture_target, 0);
out_textures[0] = p->gl_texture;
return 0;
}
static void unmap_image(struct gl_hwdec *hw) { }
static void destroy(struct gl_hwdec *hw)
{
struct priv *p = hw->priv;
GL *gl = hw->gl;
CVPixelBufferRelease(p->pbuf);
gl->DeleteTextures(1, &p->gl_texture);
p->gl_texture = 0;
}
const struct gl_hwdec_driver gl_hwdec_vda = {
.api_name = "vda",
.imgfmt = IMGFMT_VDA,
.create = create,
.reinit = reinit,
.map_image = map_image,
.unmap_image = unmap_image,
.destroy = destroy,
};
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